There's a Steam Machine for every type of gamer in every type of budget.
The Steam Controller and Steam Machines have been centeral to Valve's GDC presentations this year, with the biggest news being that they will finally be in our hands this November. Now, Valve has posted the full list of Steam Machines that will be available at launch, listing their manufacturers, system specs, and prices. The launch wave of Steam Machines will retail from anywhere between $459 and $4,999, meaning there is a machine for any budget.
The cheapest Steam Machine is the iBuyPower SBX, for $459, and comes with an AMD Athlon™ X4 840, ATI Radeon™ R7 250X 1GB GDDR5, 4GB Ram and a 500 GB hard disk. It's a pretty comparable price to what a PS4 or Xbox One will set you back, with comparable, if not better, specs.
Middle-of-the-road type Steam Machines like the Asus ROG GR8S ($699) and the Maingear DRIFT ($849) come with specs that completely blow "next-gen" consoles out of the water, like Core i7 Processors, Nvidia Geforce® GTX 980s, 16 GB of RAM and 512 GB Solid State Drives.
Finally, for the man with more money than sense, the top-of-the-line beast-mode Steam Machines like the fully-upgraded ORIGIN OMEGA Steam Machine and Falcon Northwest Tiki Steam Machine (both $4,999) come with crazy stuff like Core i7 4790Ks, triple SLI Titans, 32 GB of RAM and up to 14 TB of storage.